Definition (主題)
of primary importance in the matter being discussed
在討論問題中極為重要的；核心關鍵的
The topic of the debate is pertinent to the issue at issue.
辯論的主題與核心問題密切相關。
In this report, the source of funding is at issue.
在這份報告中，資金來源是核心問題。
The differing perspectives on the matter highlight what is truly at issue.
對此事的不同觀點凸顯了真正的核心問題。